I was using Scrivener last night, and everything was just fine. When I started it up this morning, the screen was gray and it won't let me write anything, or see what I wrote last night. I can add new pages and folders, add to the meta data etc, and compile it to a pdf, and read the pdf-- I just can't write anything in the draft portion.

Last night the pages were white and the binder tree was black type against a white background. Now it's white against grey.

If I open the tutorial or any other file, it looks the same way. It seems like it could be something elementary that I'm missing, but I can't figure out what it is. I've been using Scrivener for Linux off and on for some years now and this never happened before. My system is xubuntu 64-bit Linux 16.04.

This has happened to me several times too. I did something similar to fix it.Rather than reset to defaults I saved my own preference settings to a file. Whenever the problem occurs, I load that file. It's a pain though.